refactor: remove unused knobs, strings and stale text

Drop what nothing uses any more: the --max-syllables flag with its
sourceSpec field, meta row and reject reason; the store's clearRejection;
the --gap CSS token; three orphaned i18n strings; two exports with no
importer; the preview npm script; the proto.yml "baseline exists" step
that has been unconditionally true since the schema landed on main; and
two root-level .gitignore entries for paths Playwright never writes.

Correct text that outlived its subject: NOTICE named a tools/ directory
that never existed, the README still pointed at the first plan and
carried a migration note for retired sources, and a few comments still
said "release" for an upstream that is a weekly export. The pin test
header now says three copies and also holds README and ATTRIBUTION to
the same URL; the Make-targets table lists clean and help.

Wire fixtures regenerated so client_hello uses the ProtocolVersion
constant and server_game_started carries the 30s turn limit.
builder_version becomes 4 for the dropped meta row.

web/e2e/fixture-dictionary.js

@@ -56,7 +56,7 @@ export const ONE_SYLLABLE_WORD = 'sinh';
  * an unhelpful "game_start_failed". Asserting it here turns that into a
  * sentence a reader can act on.
  */
-export const HUB_SYLLABLE = 'sinh';
+const HUB_SYLLABLE = 'sinh';
 const MIN_OPENING_OUT_DEGREE = 20;
 
 const hubContinuations = (byFirstSyllable.get(HUB_SYLLABLE) ?? []).length;
@@ -66,5 +66,3 @@ if (hubContinuations < MIN_OPENING_OUT_DEGREE) {
 			`the server needs ${MIN_OPENING_OUT_DEGREE} before it will open a game on that syllable`
 	);
 }
-
-export { words };

web/package.json

@@ -6,7 +6,6 @@
   "scripts": {
     "dev": "vite dev",
     "build": "vite build",
-    "preview": "vite preview",
     "prepare": "svelte-kit sync",
     "check": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json",
     "test": "vite build && vitest run",

web/src/app.css

@@ -30,7 +30,6 @@
 
 	--radius: 12px;
 	--radius-sm: 8px;
-	--gap: 12px;
 	--font: system-ui, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
 
 	color-scheme: light;

web/src/lib/i18n/vi.js

@@ -34,12 +34,10 @@ export const t = {
 	you: 'Bạn',
 	opponent: 'Đối thủ',
 	someone: 'Người chơi',
-	scoreLabel: 'Điểm',
 	syllableUnit: 'tiếng',
 	correctedFrom: 'Bạn gõ “{typed}”, từ đúng là “{word}”.',
 
 	secondsLeft: '{n} giây',
-	waiting: 'Đang chờ…',
 	connecting: 'Đang kết nối…',
 	connected: 'Đã kết nối',
 	reconnecting: 'Mất kết nối, đang thử lại…',
@@ -77,7 +75,6 @@ export const t = {
 	copyLink: 'Sao chép liên kết mời',
 	shareLink: 'Chia sẻ',
 	copied: 'Đã sao chép',
-	waitingForOpponent: 'Đang chờ người chơi vào phòng…',
 	leaveRoom: 'Rời phòng',
 	shareInvite: 'Vào chơi nối từ với tôi',
 

web/src/lib/stores/game.svelte.js

@@ -492,9 +492,6 @@ export function createGameStore() {
 			);
 		},
 
-		clearRejection() {
-			state.rejection = null;
-		},
 		clearError() {
 			state.error = null;
 		},

web/src/lib/ws/client.js

@@ -39,7 +39,7 @@ export const LIVENESS_TIMEOUT_MS = 3 * PING_INTERVAL_MS;
  * client reconnects every half second forever after a deploy that bumps the
  * protocol.
  */
-export const TERMINAL_ERROR_CODES = new Set(['protocol_version_mismatch']);
+const TERMINAL_ERROR_CODES = new Set(['protocol_version_mismatch']);
 
 const RESUME_KEY = 'noitu.resumeToken';
 

web/tests/dictionary-source.test.js

@@ -1,10 +1,12 @@
-// The upstream dictionary URL lives in two places: the Makefile, which builds
-// it for a developer, and the Dockerfile, which builds it for the image. They
-// have to agree, or the container ships a wordlist nobody tested against.
+// The upstream dictionary URL lives in three places: the Makefile, which
+// builds it for a developer, the Dockerfile, which builds it for the image, and
+// the builder, which stamps it into the database. They have to agree, or the
+// container ships a wordlist nobody tested against. The docs that quote the
+// URL are held to the same copy.
 //
 // This lives in the JavaScript suite for no better reason than that it is the
-// suite that already reads other files in the repository. It is checking two
-// build files, not the frontend.
+// suite that already reads other files in the repository. It is checking build
+// files and docs, not the frontend.
 
 import { readFileSync } from 'node:fs';
 import { fileURLToPath } from 'node:url';
@@ -49,4 +51,11 @@ describe('the upstream dictionary export', () => {
 		const builderUrl = pin(builder, /kaikkiSourceURL\s*=\s*"([^"]+)"/, 'kaikkiSourceURL in the builder');
 		expect(builderUrl).toBe(makeUrl);
 	});
+
+	it('is the URL the docs quote', () => {
+		for (const rel of ['../../README.md', '../../data/ATTRIBUTION.md']) {
+			const doc = readFileSync(fileURLToPath(new URL(rel, import.meta.url)), 'utf8');
+			expect(doc, `${rel} does not quote DICT_URL`).toContain(makeUrl);
+		}
+	});
 });